MAX3991UTG+

Overview

The MAX3991UTG+ is a clock and data recovery (CDR) integrated circuit designed for SONET/SDH and XFP optical receivers. It operates with a maximum frequency of 693.5 MHz and features CML differential input and output interfaces. The device includes an internal amplifier and PLL, supporting a 1:2 input-to-output ratio. It functions within a supply voltage range of 3 V to 3.6 V and is rated for commercial temperatures from 0°C to +85°C. Packaged in a 24-TQFN (4x4 mm) exposed pad configuration, it is intended for high-speed serial data applications requiring precise timing recovery.

Feature Summary

• Integrated Clock and Data Recovery (CDR) with built-in amplifier
• Supports data rates up to 693.5 MHz for SONET/SDH and XFP standards
• CML differential input and output signaling
• Internal Phase-Locked Loop (PLL) for jitter attenuation

Applications

• SONET/SDH optical receiver modules
• XFP form factor transceivers
• High-speed serial communication systems

Part Context

The MAX3991UTG+ belongs to the Maxim Integrated portfolio, now part of Analog Devices Inc. following the 2021 acquisition. This component is categorized under application-specific clock and timing ICs, specifically targeting optical networking infrastructure where reliable signal regeneration is critical.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices technical support for current availability or alternative components within the MAX399x family.